Screening apparatus for wagon-dumping apparatus.



No. 792.635. PATENTED JUNE 20, 1905.

W. H. TRINDLE & W. H. FAIRBROTHER. SCREENING APPARATUS FOR WAGON DUMPING APPARATUS.

APPLICATION FILED NOV. 14, 1904.

Httomegs nvent rs UNITED STATES Patented June 20, 1905 PATENT OFFICE.

WALTER H. TRINDLE AND WILLIAM H. FAIRBROTHER, OF LOVELAND, COLORADO, ASSIGNORS OF ONE-THIRD TO ALEXANDER V. OFFICER,

OF LOVELAND, COLORADO.

SCREENING APPARATUS FOR WAGON-DUIVIPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 792,635, dated June 20, 1905.

Application filed November 14, 1904. Serial No. 232,760.

To all whom it may concern.-

Be it known that we, WALTER H. TRINDLE and WILLIAM H. FAIRBROTHER, citizens of the United States, residing at Loveland, in the county of Larimer and State of Colorado, have invented a new and useful Screening Apparatus for Wagon-Dumping Apparatus, of which the following is a specification.

This invention relates to screening devices IQ for use in connection with wagon-dumping apparatus, and has for its object to improve the construction and increase the efficiency of devices of this character and provide means whereby the material may be efi'ectuall y 5 screened before it passes to the car and the screenings separated out and deposited in position to be weighed or otherwise disposed of.

With these and other objects in view, which will appear as the nature of the invention is better understood, the same consists in certain novel features of construction, as hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, and in which corre- 5 sponding parts are denoted by like designating characters, is illustrated the preferred form of embodiment of the invention capable of carrying the same into practical operation,

2 it being understood that the invention is not 3 necessarily limited thereto, as various changes in the shape, proportions, and general assemblage of the parts may be resorted to without departing from the principle of the invention or sacrificing any of its advantages.

In the drawings, Figure 1 is a front elevation. Fig. 2 is an end elevation, partially in section, of the improved apparatus. Fig. 3 is an enlarged transverse section of the receiver for the screenings.

4 Apparatus of the class to which this invention relates are generally erected adjacent to railway-tracks, and all protruding parts must be withdrawn when not in use to avoid being struck by passing trains, and in the devices herein described this requirement is fully and effectually accomplished, as will be hereinafter shown.

The improved devices may be readily adapted to the various forms of wagon-dumping apparatus employed and for the purpose of 5 clearness is shown applied to a conventional construction of such a device, in which the main frame 10 is formed to support the tilting platform 11 and with a screen (represented as a whole at 12) and preferably hinged to one edge of the frame, as at 13, in position to receive the contents of a wagon when dumped by the tilting of the platform. The frame 10 is provided with a stop member 14 to limit the downward movement of the platform, as indicated by dotted lines in Fig. 2, and the screen 12 is provided with supporting-cables 15 to hold it in an inclined position relative to the frame or permit the same to be lowered down against the frame when not 5 in use, as indicated by dotted lines in Fig. 2. The screen is formed of a surrounding rectangular frame 16 and spaced slats 17, the latter preferably of gas-piping, which combine lightness with strength. 7

Supported for movement between spaced members 18 19 of the framework 10 are receptacles 20 21 for the material passing through the screen and pivoted, respectively, as at 22 23, to the members 18 19 intermediately of their lengths. The receptacles are open at their adjacent or inner ends and closed at their outer ends and are connected to the swinging end of the platform by rods 24 25, the latter having longitudinal slots 26 27 in their free ends for engaging pins 28 29 on the receptacles between their pivots 22 23 and the closed ends of the same. By this means when the platform is in its level position the rods will likewise be in their elevated position and hold the receptacles in their tilted position to discharge the contents therefrom, and then when the platform begins to tilt it will not affect the receptacles, by reason of the elongated apertures or slots 26 27, until the inner 9o ends of the latter reach the pins 28 29, so that the receptacles will be actuated only at the last portion of the movement of the platform, as hereinafter more fully explained.

The stop member 141s supported centrally by a truss-frame composed of a central post 30 and tie-rods 31 32, the post also utilized to support the central portion of the front frame 10 by a brace member 33, thus leaving the whole space between the end portions of the framework unobstructed at the front or screen side, as will be obvious, to provide ready means for the removal of the material discharged from the receptacles 2O 21.

Hinged at 34: to the frame 10 at the outer side of the receptacles 2O 21 is a chute 35 for guiding the material passing through the screen into the receptacles when in its outward position, as in dotted lines in Fig. 2, and foldable against the frame to be out of the way when notin use, as shown by full lines in Fig. 2.

Attached to the stop member 1a is a guidesheave 36, over which a cable 37 leads and connected by its ends, respectively, to the chute 35 and platform 11, so that the latter when in its elevated position will hold the chute folded against the frame 10 and. when tilted will automatically release the chute and permit it to fall outward by gravity in position to receive the material passing through the screen. The cable 37 is connected to the chute 35 relatively near the hinge 34:, so that the chute will .qu'ickly assume its operative position at the first portion of the downward movement of the platform and before any of the material is deposited upon the screen, the cable 37 having sufficient slack to insure this action.

When a load of material is to be deposited in a car, the screen member 12 is protruded, by properly manipulating the c: bles 15, into its operative position, as shown in Fig. 2, and the wagon (indicated by dotted lines 38) containing the material driven upon the platform 11 and the latter tiltedinto the position shown in dotted lines in Fig. 2 to dump the load upon the screen, this movement, as above described, causing the chute 35 to fall outward and elevating the receptacles 2O 21. The material in falling over the screen is divided, the finer particles of refuse and immature material falling through the screen and the perfect parts only passing to the car. The screenings pass to the receptacles 2O 21 and are held therein until the platform, together with the wagon thereon, is righted, when the rods 24: 25 will tilt the receptacles and discharge the contents into another receptacle or into a wagon to be weighed or otherwise disposed of.

The device may be employed in handling various products, but will be of special advantage in loading beets, potatoes, and similar products which necessarily contain quantities of loose earth and other foreign matter, which will be removed by the above-described apparatus.

The device may be adapted for either side or end dumping, as will be obvious.

Having thus described the invention, what is claimed is 1. In a device of the class described, a tilting platform having an inclined screen associated therewith, a receptacle movably disposed for receiving the material passing through said screen, and means whereby said receptacle is operated to discharge the contents at the return movement of the platform.

2. In a device of the class described, a tilting platform having an inclined screen asso ciated therewith, a receptacle movably disposed for receiving the material passing through said screen, achute mounted to swing between said screen and receptacle for conducting the material into the receptacle, and. means whereby said receptacle is operated to discharge the contents and the chute elevated to a vertical position at the return movement of the platform.

3. In a device of the class described, asupporting-frame having an inclined screen extending therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movably connected to said frame for receiving the material passing through said screen, and means whereby said receptacle is operated to discharge its contents at the return movement of said platform.

at. In a device of the class described, a sup porting-frame having an inclined screen extending therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movably connected to said frame for receiving the material passing through said screen, a chute mounted to swing between said screen and receptacle to conduct the material into the same, and means whereby said rece'ptacle is operated and said chute elevated at the return movement of said platform.

5. In a device of the class described, a supporting-frame having an inclined screen extending therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movabl y connected to said frame for receiving the material passing through said screen, and connecting-rods between said receptacle and platform whereby said receptacle is depressed to discharge the contents at the return movement of said platform.

6. In a device of the class described, a supporting-frame having a screen swinging therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movably connected to said frame for receiving the material passing through said screen, means whereby said screen is foldable against the frame when not in use, and means whereby said receptacle is operated to discharge the contents at the return movement of said platform.

7 In a device of the class described, a supporting-frame having a screen swinging therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movably connected to said frame for receiving the material passing through said screen,

a chute mounted to swing between said screen and receptacle to conduct the material into the same, means for closing said chute against said frame and operating said receptacle to discharge the contents at the return movement of said platform, and means for folding said screen against said frame when not in use.

8. In a device of the class described, a sup: porting-frame having an inclined screen extending therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle movably connected to said frame for receiving the material passing through said screen, a rod connected by one end to said platform and having a longitudinal slot in the free end engaging a pin upon said receptacle, whereby said receptacle is operated to discharge the contents at the last portion of the return movement of the platform.

9. In a device of the class described, a supporting-frame having an inclined screen extending therefrom, a tilting platform carried by said frame and associated with said screen, a receptacle pivoted intermediately thereof to said frame for receiving the material passing through said screen, a rod connected by one end to said platform and provided at the other end with a longitudinal slot for engaging a pin disposed upon one side of said receptacle at one side of its pivot whereby the receptacle is operated to discharge the contents at the last portion of the return movement of the platform.

In testimony that we claim the foregoing as our own we have hereto afiixed our signatures in the presence of two witnesses.

WALTER H. TRINDLE. WILLIAM H. FAIRBROTHER.

Witnesses:

bro. (3. WILSON, A. V. OFFICER. 

